Hi @rob-leadbeater_2457 ,
This is a "hard-coded" limit that's built into IIS I'm afraid; if you use the built-in Web Server or Docker, this is not an issue. Another option is to use a drop-path for the packages.
Otherwise, we have not implemented multi-part / chunked upload for Universal Packages yet; it's on our list, but there's not a huge demand for it.
Cheers,
Alana